diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
index a23158ca2..1f9271bff 100644
--- a/newlib/libc/include/sys/features.h
+++ b/newlib/libc/include/sys/features.h
@@ -333,7 +333,7 @@ extern "C" {
 #define _POSIX_PRIORITY_SCHEDULING	1
 #define _POSIX_REALTIME_SIGNALS		1
 #define _POSIX_SEMAPHORES		1
-/* #define _POSIX_SHARED_MEMORY_OBJECTS	1 */
+#define _POSIX_SHARED_MEMORY_OBJECTS	1
 #define _POSIX_SYNCHRONIZED_IO		1
 #define _POSIX_TIMERS			1
 #define _POSIX_BARRIERS                 200112L